Pumping mechanism



Oct. 30, 1934. E. J. svENsoN 1,978,480

PUMPING MECHANISM Filed June 20, 1930 2 Sheets-Sheet 1 www MMN QN W0@ W @www m ww a Q w Q d, *liv f d) mw 3 f v .rd JW %\\m f \)r\/\ J n r z I.- M, @,Mh www# s\\ E mw A* Y n@ k l w i Q l MISA@ l @NSJ .NN w XXV? n Q Nw NQ @J www. QN ifi; www@ www mi @e uw fwlw @J f ww Oct. 30, 1934. EJ. svENsoN PUMPING MECHANISM Filed June 20, 1930 2 Sheets-Sheet 2 f //l Y Patented Oct. 39, 1934 UNITED STATES PATENT OFFICE My invention relates generally to fluid propelling mechanisms, and particularly to .the type for controlling iiuid which is used as a propelling medium. Present day industries are particularly interested in using machinery which is compactly arranged in order to eliminate the necessity of taking up extensive floor space, and in order to facilitate the adjustment, assembly, disassembly, replacements, etc., of the constituent parts.

Compactness in designis particularly desirable in connection with machines which are hydraulically controlled. In using variable displacement pumps of the reciprocable piston` type for propelling `a. fluid medium through a iiuid system, a sec-4 ond pump-is employed which serves to charge the plunger pump; Therefore it is desirable to arrange these pumps as compactly and conveniently as possible. In some instances gear pumps are employed to furnish a charging fluid-to the plunger pump, and it is one of the primary objects of mypresent invention to provide a simple, compact, and convenient arrangement.

whereby a charging pump such as a gear pumpA may be coupled with a plunger pump.

More specifically, my invention contemplates the provision of a self-contained structure, wherein a plunger pump is coupled with and operated in response -to the actuation of a charging pump such as a gear pump. l

Another object is to, provide in combination with aV plunger pump having a plurality of reciprocable pistons mounted within a stationary support and a central rotary driving means for actuating said pistons, a gear pump which-is adjacently po- 35 sitioned and directly coupled with said rotary driving mechanism.

Still more specifically, my invention contemplates the provision of an improved, compact', selfcontained pump structure, in which a variable 40 delivery charging pump is directly coupled with a variable displacement high pressure plunger pump. one of said pumps being operable in response tothe actuation of the other. A further object is to provide a plunger pump of the type set forth above, having a laterally adjustable rotary driving mechanism, and a gear coupled thereto which forms one of the gears of a gear pump, said gear pump being employed for charging the pistons in said plunger pump. A

These and numerous other objects and advantages Will be more apparent from the following detailed description when considered in connection with the accompanying drawings, wherein- Figure 1 is a central verticalsectional view of a. pumping mechanism which is representative of 2s calms. (ci. 1oz-5)' one embodiment of my invention, said view being taken substantially along the line 1,-'1 of Figure 5;

Figure 2 is a fragmentary transverse sectional view taken along the line 2 2 of Figure 1, disclosing the general arrangement of the rotary valve and the fluid conducting passageways communicating therewith;

Figure 3 is a fragmentary central sectional view taken longitudinally of the tapered valve along the line 3--3 of Figure 1. aportion ofv said valve and coupling therefor being shown in elevation in order to, more clearly disclose the structural arrangement thereof;

Figure 4 is a transverse sectional view taken substantially along the line 4 4 of Figure 1; and

Figure 5 is also a transverse sectional view taken substantially along the line 5-5 of Figure l.

Referring now to the drawings more in detail, wherein like numerals have been employed to designate similar parts through the various tigures, it will be observed that my invention contemplates the provision of a pumping mechanism which is comprised chiefly of two pump units, one of said units comprising a gear pump which I have designated generally by the numeral 10, and another unit comprising a plunger pump which I have designated generally by the numeral 1,2. Certain of the structural features of these two pumps are similar to structures disclosed in my co-'pending applications, Serial Nos. 430,867 and 430,868, led February 24, 1930, and therefore a detailed description of the functional and structural characteristics of certainof the parts is not necessary to a thorough understanding of .the present invention. My present invention is concerned chiey with the presentation of a selfcontained, .compact ,tvio-pump arrangement, ,wherein a charging pump and a plunger pump are combined so as to provide a portable, unitary pump construction. Itwill be'seen that my improved pumping mechanism includes an end casing or frame 14 and an oppositely disposed casing i6, Figure 1. Interposed` between the upper portions of these casings 14 and 16 is a gear 18, said gear being mounted upon a sleeve 20, which sleeve is in turn secured to a head 22 by means of a pin 24. An extension of this head 22 provides a drive shaft 26, which passes through a suitable stufiing box 28 mounted within the casing 16. The shaft 26 is mounted within a suitable anti-friction roller bearing 30, and the sleeve 20 which projects beyond the extremity of the head 22 is mounted within a similar anti-friction roller bearing 32. Positioned adjacent the inner surfaces of each of the casings 14 and 16 are spacer plates 34 and 36 respectively, and these spacer plates bear against the opposite sides of a central casing member 38. Pins or dowels 40 'extending through the casing and spacer members serve to maintain said parts in proper alinement. In addition to these dowels 40,.suitab1e bolts 42 serve to clamp the parts together. The spacer plates provide a chamber for accommodating the gear 18, as well as a companion annular gear 44 which meshes with the gear 18.

Positioned within the sleeve 20 is a cylindrical valve member 46., which is adaptedvto be r0- tatably adjusted by means of an external, manually operable lever 48. This lever 48 is secured to a stub shaft 50, the inner extremity of which has' a tongue 52 which is received by a groove 52a in the valve member 46. A peripheral port 54 in the valve serves to control the flow of fluid from between meshing teeth of the gears 18 and 44. The gear 18 is provided with a plurality of radial ports or passageways 56 and-56a which are adapted to successively communicate with the valve port 54 during the rotation of the gear, thereby relieving against fluid pressures which would otherwise be developed between the meshing teeth.

Fluid is directed lto an intake chamber 58 of the gear pump 10, Figure 4, from any'suitable source (not shown) through a pipe 60. A pipe 62 serves to convey fluid from the discharge or high pressure chamber 6.4 of said pump to the intake chamber 66 of the plunger pump 12. This chamber 66 is housed within a suitable end casing 68, which is clamped against the end surface of an annular section 'l0 of the end frame 14. Fluid entering the chamber 66 from the gear pump 10 is directed through longitudinal passageways '72 of a tapered 4rotary fluid control valve 74, Figure 3, and these longitudinal passageways 72 communicate with a peripheral 'valve port 76. The tapered valve '74 is rotatable within a suitable tapered bearing rI8 which isy provided withvradial ports 80, Figures 2 and 3.

Radiating and inclined from these radial ports are passageways 82 which communicate with the outer extremities of piston chambers or cyl-` inders 84. Pistons 86 are reciprocably mounted within these chambers 84, and a central driving mechanism including a driving ring 88, when eccentrically positioned, is adapted to impart movement to said pistons.l Interposed between this driving ring and said pistons are pivoted fingers 90 which serve to prevent side thrust from being imparted to said pistons.

During the reciprocation of these pistons, fluid is directed from the peripheral valve port 76 to the radial passageways 82 communicating therewith, and fluid'from the other passageways 82 is directed to a second peripheral valve port 76a, which communicates by means Aof a. valve passageway 92 with an annular port 94. This port 94 communicates with a discharge pipe 96,` which isadapted to be, connected at any point where a propelling uid medium is required.

T he inner end of the tapered valve 74 makesa. tongue and groove connection with the adjacent extremity of a driving member 98, which supports the driving ring'88. Interposed between the driving ring 88 and the rotary supporting member 98 are friction reducing balls 100. This rotary driving-member 98 is' laterally shiftable within and driven by a journal or sleeve 102, said sleeve being provided with transverse slots 104 and 106 for slidably receiving companion portions of the member 98. The sleeve 102 is keyed .t0 the annular gear 44 andl is rotatably mounted within anti-friction bearings 108 and 110, Figure 1. An anti-friction thrust bearing 112 is interposed between one extremity of the sleeve 102 and an annular abutment 114 formed integral with an adjusting nut 116. Positioned on the opposite side of this annular abutment 114 is a collar 118 which is secured to the outer extremity of a longitudinally shiftable adjusting member 120. 'Ihls member 120 is of cylindrical form and is longitudinally shiftable within the sleeve 102. 'Ihe inner extremity of the member 120 is provided with an extension 122, which extends into a companion cylindrical recess 124 provided in the laterally shiftable driving member 98. Thus, in response to the longitudinal shifting of the member 120 within the sleeve 102, lateral movement will be imparted to the driving ring 88, thereby varying the 'stroke of the pistons 86 within their stationary housing or support. rlfhe nut 116 which is screwed within the casing 16, is manually operable from a point externally of the casing for the purpose of imparting longitudinal move ment tothe adjusting member 120. By means of suitable micrometer graduations, the longitudl nal shifting of the nut 116 may be accurately determined.

From the foregoing it will be apparent that my invention provides a very compactly arranged two-pump arrangement, wherein two pumping devices, one a gear pump for supplying fluid at charging pressures and the other a high. pressure plunger pump of improved practical construction for receiving charging fluid from said gear pump, are included within a'single housing or casing structure. Rotationis impartedto the drive shaft 26 from any suitable source of power supply (not shown), such for example as a' rotatable element of a lathe, milling machine, or the like, and rotation of this ldrive shaft imparts rotation to the gear pump, as well as to the plunger pump. By my improved compact construction, long pipe lines are eliminated and the number of ypump elements is materially reduced, thereby providing a very economical construction from the standpoint of manufacture. By using pumps of the delivery type here disclosed, and by having simple, externally positioned, manually operable adjusting means, the charging pressure, as Well as theI pressure of the iluid discharged from the plunger pump, may be conveniently and accurately controlled in accordance with-the requirements of the machine with whichl the pumping device may be associated. 'Ihe adjustment for displacement of these pumps may be made during the operation ofthe pumps, and this is also decidedly advantageous. There are no elements of complicated design which would have a tendency of getting out of order, and all adjustments, replacements, and the like may be made in a very convenient and expeditious manner. The fact that one of the gears of the gear pump is adapted to form a driving element of the plunger pump, enables a material reduction in the number of parts required to operate said pumps. In other words, my invention contemplates the rprovision .of la combined pumping arrangement wherein a driving means, such as a sleeve 102 and the laterally adjustable driving memberV 98, serves to directly couple a charging pump, such as a gear pump, with a variable displacement pump, such as a plunger pump.

Obviously various modifications and changes in structural features may be made without departing from the spirit and scope of my present invention. and said invention should be limited stroke experienced by said pistons, 'a charging pump operatively connected with said rotary driving means for delivering iiuid to said pistons. means for varying the stroke of said vsingle row of pistons to very the uid displacement, and means for directing iiuid from ,the discharge side of said charging pump to said reciproeable pistons. 2. In a iuidpropeiling mechanism, stationarysupportlng means, aplurality of radial reciprocable pistons therein for receiving -iiuid under a given pressure and discharging said nuid under another pressure, rotary driving means for iniparting movement to said pistons,avariable delivery charging pump operatively connected with said rotarydriving means for delivering tuid to said' pistons, control means within the charging pump for governing the rate of uid delivery before said uuid emerges trom said .charging pump, and means for directing fluid from the discharge side of sri-ici variable delivery charging pump to said reciprocahle pistons. A

3. In a' fluid propelling mechanism, stationary supporting means. a single rcar of annular-ly disposed and radially reciprocable pistons therein for receiving fluid under a given pressure and discharging said ud'un'der another pressure, rotary driving means for imparting movement to said pistons and in continuous contact therewith, a variable delivery gear pump operatively connected with said rotary driving means for .delivering tiuid'to said pistons, and .means for directing iluid from the Vdisclxarge' side of said gear pump to said reciprocable pistons.

4. In a iiuid propelling mechanism, stationary supporting means, a plurality of radial reciprocable pistons therein for receiving fluid under a given pressure and discharging said fluid under another pressure, rotary .driving means for irnparting movement 'to said pistons, a gear pump operatively connected with said rotary 'driving means for delivering fluid to said pistons, one oi the lgears in said pump being positioned in axial alinement Vwithjsaid rotary drivingmeans, and meansincluding a rotary valve mechanism for directing fluid from the discharge side of said gear pump to said reciprocable pistons.

5. In .a fluid propelling mechanism, stationary supporting means, a plurality of radial reciprocable pistons therein for receiving uid under a given pressure and'discharging said fluid under another pressure, unitary valve meansfor controlling the ow of tluid towardv and away from said pistons,' rotary driving means for imparting movement to said pistons, -a charging pump operatively connected witlfsaid rotary driving means for delivering fluid to said pistons, and means for directlngiiuid from the discharge side of said charging pump to the means for controlling the iiow of uuid toward and away from said pistons. 6. In a `iiuid propelling` mechanism, a gear i pump, a plunger pump coupled with one of the gt aarslofl said gear pump, vvthe plungers of said 'la laterally adjustable driving means for imparti plunger pump being spaced from the structure of said gear pump, means for directing fiuidfrom the discharge side of said gear pump to said plunger pump, said propelling mechanism being connectible with' a suitable source of power supply, and a laterally adjustable driving means for imparting movement to said pistons.

7. In a fluid propelling mechanism, a plunger pump including a stationary plunger support havinga' plurality of plunger-s radiating from e. common mais,V a gear pump for charging said plunger pump, the airis about which the plungers are disposed being coincident with the axis of one of the gears oi said gear pump, means for cou pling said last mentioned gear with said plunger pump, means for directing fluid from the dis= charge side of said gear pump to said plimgc-: pump, said propelling mechanism being cbnnectc ible with a suitable source of powersuppiy, and

'C5 ing movement to said pistons. Y

Ei. In a iiuid propelling mechanism, a plunger pump having e plurality of radially reciproeahle plungers for receiving fluid under a given pressurcaid discharging said iiuid under another pressure. a laterally shiftable rotary driving nies-ns for said lplungers, the lateral shifting of seid.- dziving means serving to vary the strolie of said plimgers, a. gear pump for charging said plungers, said laterally slftebleplunger actuating means being coupled with one of the gear of said charging pump, and meansior directing fluid from the discharge' side of said charging pump to said plunger pump.

s. In fluid propelling mechanism, a plunger pump having a plurality oi radially reciprocable plungers for receiving uid Aunder e given pressure. and discharging said fluid under another pressure, means for imparting movement to said pistons, a charging pump for delivering iiuid under charging pressure to said plunger pump, said charging pump being coupled with said plunger actuating means, said coupling means including a support rotatable about ,a fixed axis andV means driven thereby and shiftable laterally thereof for 120,

imparting movement to said plungers, 'and means for directing fluid fromsaid charging pump to said plungers.

le. In a iiuid propelling mechanismm plunger pump having a pluralityr oi'fradially reciprocable plungers for receiving uid under a charging pres sure and delivering said uid under another pressure, means for imparting movement to said plungers,.unitary valve means Yfor controlling the flow of fluid toward and away from said plungers, a charging pump for delivering fluid to said plunger pump', said charging pump being coupled with saidplunger actuating means, and means for directing iiuid from said charging pump to said control valve. A

l1. In a iiuid propelling mechanism, a plunger pump having a plurality of radially reciprocable plunger-s for receiving fluid at a charging pressure andfdelivering said iiuid' at another -pressure, rotary driving mechanism for imparting HG movement to said plungers, a gear pump for cielivering fluid under a charging pressure, one of the gears of said pump being of annular construction, said rotary driving mechanism including a sleeve member extending within the opening 145 in said annular gear land coupled to said geen and means for directing iuid from' the discharge side of said gear pump to said plunger pump.

12. In a Lfluid propelling mechanism, a plunger Dump having a plurality or radiallyreciprocable 150 4als plungers for receiving fluid at a charging pressure and delivering said fluid at another pressure,

side of said gear pump to said plunger pump, and

means for laterally shifting a portion of said driving mechanism to vary the stroke of said plungers.

13. A pumping unit including a housing, a plunger pmp within said housing, means manually operable from a point externally of the housing for varying the stroke of the plungers to correspondingly vary the displacement of said plunger pump, a gear pump enclosed within said housing for charging said plunger pump, one of the gears of said gear pump being directly cou.- pled with said plunger pump, and means controllable from a point externally of the housing for adjusting the delivery of sa'id gear pump independently of the means for adjusting the displacement of said plunger pump.

14. A pumping construction including a piston support, a plurality of radially disposed pistons in said support, a rotary valve whose axis is posi-V tioned in substantialA parallelism with the axis about which the pump pistons radiate for controlling the delivery and discharge oi fluid to and from said pistons, a housing, a gear pump in said housingy including a gear positioned in substantial alinement with respect to the axis about which the pistons radiate, and means connecting the discharge side of said gear pump with the intake side of said plunger pump.

15. A pumping construction including a piston support, a plurality of, radially disposed pistons in said support,.a rotaryvalve whose axis is positioned in substantial parallelism with the axis about which the pump pistons radiate for controlling the delivery and discharge of uid to and from said pistons, a housing, a gear pump in said housing, rotary driving means for said plunger pump including a laterally shiftable section for varying the stroke of said pistons, one of the gears in said gear pump being mechanically coupled with said driving means, the axis of said gear, driving means, and rotary valve being substantially coincident, and means for conducting iiuid from the discharge side of the gear pumpto the intakeside of the plunger pump.

16. A pumping construction including a piston support, a plurality of radially disposed pistons in said support, a rotary valve whose axis is positioned in substantial parallelism with the axis about which the pump pistons radiate for controlling the delivery and discharge of iluid to and from said pistons, a housing, a gear pump 'in said housing, rotary driving means'for said plunger pump including a laterallyshiftable section for varying the stroke of said pistons, one of the gears in said gear pump being mechanically Acoupled with said driving means, the axis of said gear, driving means, and rotary valve being positioned in substantial parallelism, and means for conducting fiuid from the discharge side of the gear pump to the intake side of the plunger pump.

17. In a iluid pump, piston supporting means, a plurality of pistons radially reciprocable therein, a gear pump for delivering fluid to said pistons, and an adjustable driving mechanism` for imparting movement to said pistons, a portion at least of said driving means extending within and driven by one of the gears of'said gear pump.

18. In a fluid pump, piston supporting means, a plurality of pistons radially reciprocable therein, a gear pump for delivering uid to said pistons, an adjustable driving mechanism for imparting movement to said pistons, a portion at least of said driving means extending within one of the gears of said gear pump, and means positioned -within one of the gears of said gear pump for varying the iluid delivery of said pump.

19. In a pumping mechanism, a support, a plurality of pistons radially reciprocable within said support, driving means therefor, said driving means being laterally shiftable for varying the displacement of fluid by said pistons, means for effecting the shifting of said driving means during the operative functioning thereof, a gear pump for delivering iiuid to said pistons, and

ymeans for'varying the iluid delivery of said gear therein for receiving iiuid under a given pressure and discharging said iiuid under another pressure, rotary driving means for imparting movement to said pistons, said rotary driving means being laterally shiftable for varying the stroke setting of said pistons, said pistons being in continuous engagement with said driving means irrespective of the stroke experienced by said pistons, a second pump operatively connected with said rotary driving means for delivering fluid to said pistons and for maintaining fluid pressure at the end of the pistons oppositely disposed from the rotary driving means whereby to maintain said pistons in continuous engagement with said driving means, means 'for laterally shifting said rotary driving means to vary the fluid displacement, and means for directing uid from said second pump to said reciprocable pistons.

21. In a fluid propelling mechanism, stationary supporting means,.a single row of annularly disposed and radially reciprocable pistons therein for receiving fluid under a given pressure and discharging said fluid under another pressure,

rotary driving means for imparting movement-to said pistons and in continuous contact there- 1 with, said vdriving means being laterally shiftable for varying the-stroke setting of said pistons, a variable delivery gear pump operativefly connected with said rotary driving means for delivering fluid to said pistons at the extremity thereof oppositely disposed from said rotary driving means whereby to maintain a fluid pressure against the pistons and thereby cause said pistons to continuously maintain contact with said driving means and to deliver iluid to the pistons in accordance with the stroke setting thereof, and means for directing iluid from said gear pump to said reciprocable pistons.'

22. In a fluid propelling mechanism, a plunger pump having a plurality `of radially reciprocable plungers for receiving uid under a-given .pressure and discharging said fluid under another pressure,d a laterally shiftable rotary driving means for said plungers, the lateral shifting of said driving means serving to vary thestroke of said plungers, a gear pump for delivering uid to the extremity of the plungers oppositely disposed from said rotary driving means to thereby continuously urge said plungers into operative engagement with said rotary driving means, said laterally shiftable plunger actuating means being coupled with one ofthe gears of the gear pump, and means for directing fluid from the gear pump to said plungers.

23. In a fluid propelling mechanism, stationary supporting means, a plurality of radial reciprocable pistons therein for receiving uid under a given pressure and discharging said fluid under another pressure, rotary driving means for imparting movement to said pistons, a gear pump operatively connected with said rotary driving means for delivering uid to said pistons, one of the gears in said pump being positioned in axial alinement with said rotary driving means, and means including unitary valve mechanism for directing iiuid from the discharge side of said gear pump to said reciprocable pistons.

24. In a iiuid propelling mechanism, stationary supporting means, a plurality of radial reciprocable pistons therein for receiving fluid under a given pressure and discharging said uid under another pressure, unitary valve means for controlling the ow of fluid toward and away from said pistons, adjustable rotary driving means for imparting movement to said pistons, said valve means being operable in synchronism with said driving means irrespective to its position of adjustment, a charging pump operatively connected with said rotary driving means for delivering uid to said pistons, and means for directing fluid from the discharge side of said charging pump to the means for controlling the flow of fluid toward and away from said pistons.

V25. In a pumping mechanism, a support, a plurality of pistons radially reciprocable within said support, driving means therefor, said driving means being laterally shiftable for varying the displacement of fluid by said pistons, means for effecting the shifting of said driving means during the operative functioning thereof, a variable pressure gear gump for delivering iiuid at various pressures to said pistons, and means for controlling the pressure of the uid delivered by said gear pump during the functioning of saidV pistons.

26. In pumping mechanism, a support, a plurality of pistons radially reciprocable within said support, driving means therefor, said driving means being adjustable for varying the stroke of said pistons, means for effecting the adjustment of said driving means during the operative functioning thereof, a gear pump for delivering fluid to said pistons, and means for varying the iiuid delivery of said gear pumpv to meet the stroke requirements of said pistons and for varying the effectiveness of the fluid upon said pistons.

ERNEST J. SVENSON. 

